Dough mixer



i F. x. LAUTER'BUR ET AL 1,

June 23, 1931.

DOUGH MIXER 2 Sheets-Sheet l INVENTOR. J fm QMa/fll ATTORNEY.

Filed June 30, 1926 June 23, 1931.

F. X. LAUTERBUR ET AL DOUGH MIXER 2 Sheets-Sheet 2 Filed June, 30, 1926 A TTORNE Y.

Patented June 23, 1931 UNITED STATES PATENT OFFICE FRANK X. LAUTERBUR AND EDWARD J. LAUTERB'UR, OF SIDNEY, OHIO noncrr MIXER Application filed .Tune 30,

Our invention relates to machines for mixing dough in preparation for the making of bread and other similar products. Specifically our invention relates to closures for dough mixers, which are called in the art lids or covers, and which are required to provide a simple means of discharging the contents of the mixer after the batch is mixed, and to form a closure in an attempt to prevent material from within the bowl from splashing out during the operation of the mixer.

Covers for mixing bowls which seal tight- ,7 ly enough to prevent material from within the bowl from leaking out during the mixing operation have been attempted in the past, but to the best of our knowledge and belief, such covers have only been entirely effective in combination with fiat topped bowls. As the latest development. in mixers has been in mixers providing a fixed cover and a bowl rotatable or tiltable from under the cover, it will be obvious that the fiat top type of cover and bowl is impractical, be cause in swinging a bowl having a fiat top from under a'fiat cover, such clearance would be needed for the ends of the bowl opening to clear the central portion of the cover, that means having a wide range of movement would need to be provided, and the connecting devices for filling the bowl would have to be redesigned.

It is the object of our invention to provide a mixing bowl preferably of U shape,

7 which shall have end walls having a curved contour, and to provide for such a-bowl a cover having depending portions which shall lap preferably on the inside of theside and end walls of the bowl. In order to raise the cover so that thebowl can tilt or rock from under the cover, we have provided means which shall elevate the cover only sutficient distance to allow the depending sides to clear the top of the walls of the bowl. With such means for raising the cover, it is also our object to provide clamping means which will enable an almost perfect seal to be made between the cover and the walls of the bowl durin the operation of the mixer.

Re erringto the drawings in which we 1926. Serial No. 119,706.

have illustrated a preferred embodiment of our invention Figure 1 is an end elevation of one suitable type of mechanism which enables the raising of the cover of a mixing bowl and the tensioning of the cover in closed position.

Figure 2 is a side elevation of the mixing bowl shown iii-Figure 1.

Figure 3 is a detail view showing the cover in raised position.

Figure 4 is an end elevation of a modifi cation of the mixer shown in Figures 1-8, in which mechanism is incorporated for raising the cover without the use of springs.

Figure 5 is a side elevation of the mixer illustrated in Figure 4.

Figure 6 is a detail showing the cover in elevated position.

Generally indicated at 1 in both modifications which differ only in the construction, and operative mechanism for raising the lid, is the supporting frame of the machine. Journaled within the frame are the end shaft-s 2 of the bowl, which form the pivotal mounting for the bowl, so that when it is desired to discharge the contents of the bowl, the bowl is tilted on its pivots. This can be accomplished by suitable gear mechanism, which is not shown, as it forms no part of our invention, which may be actuated by a hand wheel 3. WVithin the bowl are the usual stirring-or mixing blades, which form no part of our invention, and which are consequently not illustrated.

As a closure for the bowls in both modifications, we have provided covers 4 which have suitable means at the edges for interlocking with the top of the walls of the bowls. Various types of beading or angle connections may be used. We have shown in Figures 1-3 inverted angles 5, which have one side 6, which depends within the inside of the wall of the bowl, and another side 7 which rests ontop of the bowl wall, and can thus be pressed down against the wall'to make a ti ht joint. In the modifications shown in *igures 46, the angle 5a may have a downwardly curved side So, which engages resiliently Within the bowl wall, and a side bowl wall.

the b li g lev r: Pive d o the end e t e rocker opposite the handle is a rod'll which is operatively connected with a link 11a fixedly mounted on a shaft 11?; which has mounted on it a cam shoe 12 which, with the d wn a m emen o t e and 9 il bear against the coveror a reinforced portion of the cover to ,form a tightclosure for If desired, in order to raise the o r .a'utemat e y t h rel as .e the handle, springs 13 may he provided which enclose studs 14,which extend through apertures i bo se .leenth ee er- Adj tm nuts 16 may be threaded on the ends of the s hdeee that deeire' t he e may be tained. a

the m dified fo m h n in Figu 1-6, we h e s wn the'boseee ,7 e he e e th ehs whieh ar exten ed th r de 8 whielh ere pi oted in arme'l9 f re kers h ch ha a h nd e 0 with whie th m c a ism m y be manually operated. In this modified form of sever adjusting h eehehiem; h f r e of gravity may be utilized to assistinthe (lOWIb wa d mo ment of th er- '7 Fr m he bevee e p ee it w l e v e tha ariou mechani ms maybe s d t raise and lower the cover, snohas springs, electromasne ie mean and Pn uma mea n although we have shown the cover as manually adju ed, it will he fu he ob o tha suitable mechanical connections may he made w h t m anism a: ti ing the, bo which 1. be r pe etive y connecte with e a e ng m h ni m, t a at a de e i erval ef m v ment of he mee anis er "tilt h the bewl me hanism for a t ti th c ve e eihg m nism m y s be et in pera on n ehviehemee ahie qui alent structure may he provided for lowerng he bow w th relat on to t c e stea pfreieingthe ver wit re a io o the b wl- I h t u pr ma y de e o ele preferre typ s fvmeehehieal conneel .ter rai ing th co er, alth ugh we have shown several, the particular feature of our conlf 9l q bei g in t g fhl shape of the fee cover a d th fee that. weilt thel e l fr m nd r th e r, an pro m a fo r i in the i eive e that the ewl n he til e here, Patent ie= Ewing hee le er hel ou ven e he e le m as e nd d sire eee ure by e ?In e med with e m xing maehihe,

a bowl element pivotally mounted on a fixed axis, walls of said bowl having upper edges arcuately shaped along arcuate lines formed with said fixed-axis as a center, a cover for said bowl, having a contour similar to that of the upper edgesof said walls, depending portions of said covers adapted to seat withinsaid bowl walls to form a ti ht closure, and means for elevating said cover so as to permit said bowl to be tilted from under said depending portiOns of said cover.

2. A mixing machine having a bowl pivoted on an axis so as to permit the bowl to rock on saidaxis, walls of said bowl having upper edges arcuately shaped along arcuate lines formed with said axis as a center, a cover for said howl having a contour correspond ing to that of the upper edges ofthe walls, and said bowl and cover having interengaging means for forming a tight closure, and means for movably mounting said cover with such relation to said howl that elevation of said cover the depth of the interengaging means-will permit saidbo'wl to be pivoted on its axis. .7 i I 3. A mixing machine having a bowl pivoted on an axisso as to perniit'the bowl to rock on said axis, walls of said bowl having upper edges arcuately shaped along arcuate lines formed with said axis asavcenter, a cover for said howl having acontour corresponding to that ofthe npper edges of the walls, and said .boWl an'dlcover having intere'ngaging means for forming a tight closure, and means for movably mounting said cover with such relation to'saidloowl that elevation of said cover the depth of the interengaging means will vpermit saidhowl .to be pivoted on its axis, 1nd meansof clamping said cover onto said bowl.

4 A mixing machine having a, bowl .piv- .oted on an axis so as to permit the bowl to rock on said axis, walls ofsaid'howl having upperv edges ,arcuately shaped along arcnate lines formed with said axis as a center, a cover for said bowl having a contour corresponding to that of the upper edges of the walls, and said howl and cover having interengaging means for forming atight closure, and'means for movahly mountingsaid cover with such relation to said howl :that elevation of said cover the depth ofthe interengagin'g means will permit said howlito'loe pivoted on its axis, and meansjof clamping saidcover onto said bowl, saidinterengaging means com- 1 prising members extended 'f rom'saidcover, adapted in closed position to engage the inner facesofsaidbowl walls. 7 L I ,5. a mixing machine a. bowl element, said howl element having a pair of opposite 'walls'of convex shape formed on the curve of 3. are with the bowl Pivot as-a center, said howl having a pivotal bearingsupport so as to enable the bowl to he rocked, a cover for sa ewl; hav ng e een eve eo teui sim l to the convex opposite walls of the bowl, and means of elevating said cover sufliciently so as to permit the bowl to be rocked, said cover having depending portions adapted to engage walls of said bowl, said cover elevating means having a limit of elevating movement of slightly more than the depth of the depending portions of said cover.

6. In a mixing machine a bowl element, said bowl element having a pair of opposite walls of convex shape formed on the curve of an arc with the bowl pivot as a center, said bowl having a pivotal bearing support so as to enable the bowl to be rocked, a cover for said bowl, having a concave contour similar to the convex opposite walls of the bowl, and means of elevating said cover suflicient- 1y so as to permit the said bowl to be rocked, and means of clamping said cover against said bowl so as to form a tight closure for said bowl, and said cover having depending portions adapted to engage upper edges and sides of walls of said bowl.

FRANK X. LAUTERBUR. EDWARD J. LAUTERBUR. 

